techJava.subnetwork

java subnetwork

Let’s say here is an ip address: 192.168.10.8/24

From the first octet, we can see that:

  • this is a class C address
  • the default subnet mask of class C address is /24.
  • from the ip address we can see that the subnet mask is /24.
  • So this network doesn’t have any subnetworks, or it has only one network.
  • the network address is 192.168.10.0
  • the broadcast address is 192.168.10.255
  • the range of ip addresses is 192.168.10.1 - 192.168.10.254
  • can have maximum 254 hosts(devices) in this network.

class of ip address

The class of an ip address is determined by the first octet of the ip address.

  • Class A: 1-126
    • which is 00000001-01111110
  • Class B: 128-191
    • which is 10000000-10111111
  • Class C: 192-223
    • which is 11000000-11011111
  • Class D: 224-239
    • which is 11100000-11101111
  • Class E: 240-255
    • which is 11110000-11111111

CIDR

Do not shoot this.